Q. 255.0( 1 Vote )

An urn contains 3

Answer :

Given: An urn contains 3 white and 6 red balls


To find: the probability distribution of the number of red balls drawn and mean and variance of the distribution


Let X denote the number of red balls drawn in four balls from total of 9 balls


X can have five value, i.e. 0, 1, 2, 3, 4 as there are 6 red balls


Now,


Probability of getting 0 red ball = P(X=0)








The probability of getting 1 red ball = P(X=1)








The probability of getting 2 red balls = P(X=2)







The probability of getting 3 red balls = P(X=3)







The probability of getting 4 red balls = P(X=4)








Probability Distribution Table





Formula used:




Therefore,





Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

An urn contains 3Mathematics - Board Papers

Two cards are draMathematics - Board Papers

There are three cMathematics - Board Papers

Three numbers areMathematics - Board Papers

Let <span lang="EMathematics - Board Papers

Which of the follRD Sharma - Volume 2

Which of the follRD Sharma - Volume 2

A random variableRD Sharma - Volume 2